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Toshiba GD-1220, GD-1221 service manual When this frame is the last frame, X =, Fcf Fif Fcs, Format

Models: GD-1220 GD-1221

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3)Frame structure of binary signals

Each binary signal frame is comprised of the following sequence and fields. However, some binary signals do not have the FIF field inserted.

F		F		A		C	FCF	FIF	FCS	F

Preample
F	:	Flag sequence
		Indicates the start or end of a frame. Also establishes the frame synchronization.
A	:	Address field
		Informs the address.
C	:	Control field
		Informs if this frame is the last one in this procedure.
FCF: FAX control field
		Informs the type of the binary signal.
FIF:		FAX information field
		Informs FAX information such as the functions.

FCS: Frame check sequence

Checks if there was any error in the transmission from A to FIF.

-Format of F, A and C

					Format

	b1	b2	b3	b4		b5	b6	b7	b8
F	0	1	1	1		1	1	1	0

A	1	1	1	1		1	1	1	1

C	1	1	0	0		x	0	0	0

*When this frame is the last frame, X = 1.

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© 2006 - 2008 TOSHIBA TEC CORPORATION All rights reserved	GD-1220/1221
	DIALING/COMMUNICATION CONTROL

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Toshiba GD-1220, GD-1221 service manual When this frame is the last frame, X =, Fcf Fif Fcs, Format

Contents

GD-1220/1221 Page Transportation/Installation Vorsicht Important Service Parts for SafetyContents 2006 2008 Toshiba TEC Corporation All rights reserved System firmware version FAX OptionsGD-1220 GD-1221 Remarks STUDIO165/205 Available STUDIO167/207/237Specifications DBm to 0 dBm Level -55 dBm or lower cannot be detected DBm to -8 dBm The setting can be changed by 1 dBTransmission system EmbeddedFolio Dimension width x length Printing areaComp Features Specifications and Outline of System 08/08 Following accessories and parts come with the FAX unit Accessories and PartsAccessory Qty Options Extends the FAX functions when the FAX unit is installedOption Function Model NA/EU/AU/TW System ListADF Radf Units and Components PWA-F-NCU-631 Symbol Name FunctionLayout of PC Boards FAXRecording paper size LSU-RELATED FunctionsSize Horizontal x Vertical Effective recording area Effective recording area297 x 293 x A4-R 210 x 206 x A5-R 148 x 144 x 257 x 253 x For MJD, AUD, ASD, SAD, TWD, and CND models Unit mm inchInch Feed direction Mm 0.16 inch Effective recording area Size Horizontal x Vertical Effective recording rangePrint mode Recording paper selection algorithm Recording paper selection algorithm and print algorithmPrint algorithm Judgment parameter Reception print flowchart Start Receive FAXBit Discard parameter Discard printingVertical reduction print Similar reduction print RTI Scanning width For MJD, AUD, ASD, SAD, TWD, CND modelsScanning ST-R CompRecording paper range For MJD, AUD, ASD, SAD, TWD, and CND modelsRecording paper range A4-R Folio Folio *1 Recording paper range LT long Comp long LD longComp *2 Comp *1 Recording paper range A4 long B4 long A3 longError processing Order Drawer Limitations on reception printLSU-RELATED Functions Standby state Circuit Connection and Procedure to Change ModeDial call-up transmission to a telephone circuit YESTelephone circuit Selection of the communication modeProcedure to select the transmission mode Communication mode Toshiba original procedureSignal name Signal form Signaling System Diagram and Signal FormsCircuit control signals This signal can be sent manually Signal formReceiver Communication with the binary signalsImage signal Mode change is possible only for the original set manuallyFrames received Error occurred Only error frame retransmitted 1 completed 2 completedCFR CED NsfcsidisMCF Binary signals PRI-MPS PIPPIN PRI-EOMFCF FIF FCS When this frame is the last frame, X =Format Binary signal Format FCF format of each binary signal4800 bps, 2400 bps 9600 bps, 7200 bpsTCF 3 V.8/V.34 communication sequence Line closed Standard procedure Transmitter ReceiverSignal name Abbreviation Function Remarks Frequency transmission Capability Tone signal betweenHz and 3,750 Hz in units 150 HzALT TRNReceiver Maintains the synchroniza 7E H TionReceives an NSF sent from TransmitterEncoded image data Turn off Scrambled 1 is sent for Image data Image data are sent. TransmitterScrambled data frame to be Is completedInforms to disconnect the line Short training SignalPPS-EOP Transmission of one Is completedLine closed DIS cannot be recognized DIALING/COMMUNICATION Control DIALING/COMMUNICATION Control DIALING/COMMUNICATION Control DIALING/COMMUNICATION Control General functions FAX Automatic SwitchingTEL mode FAX modeDIALING/COMMUNICATION Control GD-1220/1221 ConfigurationDescription of Circuits ConfigurationEU/AU/AS/C models ATT3DB1 Line path switching control circuitSignal Name Type Active Description Destination CML1IC3 RLY3, IC3IC5 Dial pulse generation circuit Line 1 Dial Pulse Generation Signal Q53Line 1 Dial Pulse Generation Signal REVA1 Line Current Detection Signal IC23Line Reverse Current Detection Signal IC23 Line current detection circuitCurrent Reverse Line 1 Current Detection IC23 Signal Line 1 Current Detection Signal IC23CI detection circuit Line 1 CI Detect Signal IC23Line 1 CI Detection Signal IC23 FAX board Line monitor circuitLOW High Monitoring signalRinger/Alarm Line MonitorSound volume PWA-F-FAX-635 GD-1220 PC BoardsPWA-F-FAX-678 GD-1221 PWA-F-NCU-631 NAD, TWD, SAD PWA-F-NCU-631 MJD, AUD, ASD, CND Electrical Circuits Explanation to the Users InstallationInstallation